Some toys are designed for interactive play ( with you!) and some the dogs can enjoy without you. Depending on your relationship and training goals with your dog, you may want to limit what he has access to without you! If they can have just as much fun without you why would they want to play with you? Tug and fetch toys can be used in training, bonding, and exercising your dog. Dogs often enjoy play more than food! Other dogs may need to be taught to enjoy tugging or playing fetch.